Hit ratio of caching disk buffers

  title={Hit ratio of caching disk buffers},
  author={A. Hospodor},
  journal={Digest of Papers COMPCON Spring 1992},
  • A. Hospodor
  • Published 1992 in Digest of Papers COMPCON Spring 1992
Hit ratio is the primary measure of disk cache buffer efficiency, and may be contrasted against cache overhead. A technique to calculate the lower bound of hit ratio based on cache overhead is presented. A method to calculate average hit ratio based on I/O tracing is also developed. Finally, an example is cited showing that a hit ratio as low as 14% will offer a performance improvement over similar disk drives equipped with noncaching buffers.<<ETX>>